Atoms
What are Protons and Neutrons?
Basic particle from which all elements are made
What are atoms?
What has the same number of energy levels?
Group of elements that are considered stable
What is group 8
When no subscript is present, it is implied that each element has _______
What is one atom
Elements in the same group have
What are similar characteristics and the same number of valence electrons?
A substance that can not be broken down into a simpler substance
What is an element?
The most reactive group on the periodic table.
What is group 1
On a periodic table the atomic number determines how many _______ are in the nucleus of the atom.
What are protons and electrons?
How many total atoms are in CO2 ?
What is 3
Where electrons are found
What are energy levels, shells, or orbitals?
Determines the atomic number of an element
What is the number of protons?
The group known as the Halogens and is the most reactive group of the nonmetals.
What is group 17?
Number of electrons the 1st energy level of an atom holds
What are two electrons?
How many oxygen atoms are in the formula 3 OH2
What is 3 atoms
Are positively charged
What is a proton?
Makes up the atomic mass of an element
What are protons and neutrons?
Number of valence electrons for elements in group 15.
What are 5 valence electrons?
Number of neutrons in Carbon
What is 6 neutrons?
Reactants yield a __________ in a chemical reaction
What is a product
Most of the elements on the periodic table are classified as this (metals, nonmetals, or metalloids)
What are metals?
The special name given to the electrons in the outermost (last) energy level
What are valence electrons?
Number of valence electrons in Silicon?
What is 4 valence electrons?
A group tells us
What is the number of valence electrons?
A banana turning brown is a sign of a _________ change
What is a chemical change